The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 2015
Filed:
May. 30, 2012
Ralph T. Beeston, Tucson, AZ (US);
Erika M. Dawson, Tucson, AZ (US);
Duke A. Lee, Tucson, AZ (US);
David Luciani, Tucson, AZ (US);
Joel K. Lyman, Tucson, AZ (US);
Ralph T. Beeston, Tucson, AZ (US);
Erika M. Dawson, Tucson, AZ (US);
Duke A. Lee, Tucson, AZ (US);
David Luciani, Tucson, AZ (US);
Joel K. Lyman, Tucson, AZ (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
According to one embodiment, a method for managing cache space in a virtual tape controller includes receiving data from at least one host using the virtual tape controller; storing data received from the at least one host to a cache using the virtual tape controller; sending a first alert to the at least one host when a cache free space size is less than a first threshold and entering into a warning state using the virtual tape controller; sending a second alert to the at least one host when the cache free space size is less than a second threshold and entering into a critical state using the virtual tape controller; and allowing previously mounted virtual drives to continue normal writing activity when in the critical state.